Bolt-holding box wrench



Nov. 17, 1953 J. DILLARD BOLT-HOLDING BOX WRENCH Filed May 20, 1952INVENTOR. Jlmes D/LLARD Patented Nov. 17, 1953 TE STATES PATENT OFFICEBOLT-HQLDING BOX WRENCH James Dillard, Cincinnati, Ohio Application May20, 1952, Serial No. 288,850

This invention relates to improvements in boltholding box wrench andother types of nut and bolt tightening devices.

The primary object of my invention is to provide a self-holding-onwrench.

An object of my invention is to provide a means for utilizing a wrenchduring a nut and bolt tightening operation that will eliminate thenecessity to hold said wrench on said bolt and/or nut by hand.

Another object of my invention is to provide a wrench that can besecured to a nut or bolt head to prevent turning of the nut or bolt headand accomplish a tightening operation by a single operator when thematerial being fastened by a nut and bolt is of such size and/or shapethat it would be impossible for a single operator to handle both aholding and tightening wrench because of inaccessibility of one or theother wrench.

A further object of my invention is to provide a holding means on awrench that will keep the wrench on a nut or bolt head and secure itthereto during a tightening operation.

These and other objects will be more specifically set forth in thedescription and the drawing forming part of my application. Throughoutthe description the same indicia will identify similar parts.

In the drawings:

Figure 1 is a top plan view of my particular wrench.

Figure 2 is a side View of my particular wrench.

Figure 3 is a top plan view of an alternate form of my wrench.

Figure 4 is a side view of the alternate form of my wrench.

In the art of securing structural elements together by nuts and bolts itis customary to use two persons when both ends of bolts and nuts are notaccessible to one person.

This is especially true in body building for automotive trucks and cars.Usually it requires one mechanic on each side of the part beingassembled or attached to the chassis or body of the motor vehicle.

This extra help is necessary because present day wrenches will not stayput on a nut or bolt head without manually keeping them in place or byother makeshift means.

End and/or socket wrenches as made at present fit loosely about nuts andbolt heads and therefore cannot be depended upon to remain of and bythemselves on the nuts and bolt heads during a tightening operation.

1 Claim. (01. 81-125) In many cases limited space prevents a singleoperator from using both hands; 1. e. one for holding and one fortightening, therefore the nut and bolt must be coaxed to a tightenedposition with undue amount of turning of both the nut and bolt together.

To overcome the foregoing difficulties and accomplish a saving in manhours I have invented a wrench that will permit one person to do thework of two and permit a lone person to tighten bolts and nuts to homeposition without another person's assistance.

In Figures 1 and 2 is shown a typical double ended oifset box wrench Ihaving hollow cylindrical bosses 2 known to the trade as socketwrenches. The inner circumferences 3 of the bosses have serrations 4which prevent a nut 5 from turning with relation to the wrench during atightening operation. On opposite faces 6 and 1 of a handle 8 there arefixed lugs 9. These lugs have tapped holes In for set screws H havinghand tightening knurled heads 12 with screw driver slots for forcing anend l3 of each of the set screws against the nut 5 whereby it isretained within the hollow bosses of the wrench.

The ends l3 of the set screws extend through and are rotatable in holesI 4 within the cylindrical bosses 2. These ends are pointed to insurethe securing of the wrench to a nut or bolt head.

Surfaces l5 of the bosses and tops 16 of the lugs 9 are constructed on astraight line as indicated by line X-X, Figures 1 and 2, so as toeliminate interference by the set screws when placing the wrench on anut and/or bolt head.

An alternate structure of my invention is shown in Figures 3 and 4 andis known to the trade as a flat socket wrench. This double ended wrenchhas the same cylindrical bosses 2 with the serrated inner circumferences3.

In a handle [1 slots [8 are provided to permit free rotation andlongitudinal movement of set screws II. The screws have knurled heads l2for manual rotation of the set screws in threaded holes l9 within thehandle. Rotation of the set screws cause them to move into contact withand hold the nut securely within the cylindrical bosses of the wrench.The wrench is released from the nut by rotating the set screws away fromthe nut.

The essential difference between the two types of my wrenches becomesobvious upon examining the drawing illustrating my invention. Myalternate form of wrench is for use in close quarters where ofisetwrenches can not be used.

In using my wrench a nut is first threaded on a bolt as far as possibleby hand. The wrench is then placed about the nut and secured to the nutby means of the set screw, so that the wrench will not fall away fromthe nut. An opposite end of the wrench is then brought into contact withany obstruction that will prevent the wrench and the nut from rotatingwhen the bolt is subsequently rotated to accomplish complete tightening.

The mechanic now has both of his hands free to apply another wrench onthe opposite end of the bolt to bring the bolt and nut home to thedesired holding power without the assistance of another person.

Having thus described my invention 1 claim as new and novel and desireto secure by Letters Patent the following:

A flat wrench for tightening a nut on a bolt said wrench comprising arectilinear handle having a hollow boss in at least one of theextremities thereof, a surrounding interior wall surface of 2 saidhollow boss being provided with serrations to inhibit the rotation ofsaid nut in relation to said handle, a slot in said handle communicatingwith said hollow boss by means of a threaded hole, a set screw rotatablymounted in said threaded hole and said slot to engage said nut so as tosecure said wrench on said nut.

JAMES DILLARD.

Rafa-cine: own. the $100! mil Item UNITED STATES PATENTS Number NameDate 361.704 Lantt Apr. 26, 1887 1,505,896 Kershner Aug. 19, 1924FOREIGN PATENTS Number Country Date 20,736 Great Britain Nov. 1'7, 1900680,126 France Jan. 1'7, 1930

